CVE-2026-56920
Analyzed Analyzed - Analysis Complete

Out-of-Bounds Write in HEVC Decoder Firmware

Publication date: 2026-09-15

Last updated on: 2026-09-21

Assigner: Google Devices

Description
In s_decode_vui_param of fw_hevc_dec_header.c, there is a possible out-of-bounds write due to a logic error in the code. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.

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Meta Information

Published
2026-09-15
Last Modified
2026-09-21
Generated
2026-10-06
AI Q&A
2026-09-16
EPSS Evaluated
2026-10-04
NVD
CVE-2026-56920
EUVD
EUVD-2026-78964

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
google android *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This is a vulnerability in the HEVC video decoder where a logic error in s_decode_vui_param function can cause an out-of-bounds write. This flaw allows remote attackers to execute arbitrary code without needing additional privileges or user interaction.

Impact Analysis

If exploited, this vulnerability could allow attackers to run malicious code on your system remotely. This could lead to unauthorized access, data theft, or system compromise without requiring any user interaction or additional permissions.

Compliance Impact

This vulnerability could lead to remote code execution, potentially exposing sensitive data. This may violate GDPR's data protection requirements and HIPAA's security rules if exploited in systems handling personal or health information.

Mitigation Strategies

Update or patch the affected component (fw_hevc_dec_header.c) to fix the logic error causing the out-of-bounds write. Apply vendor-supplied security updates immediately.

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